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IBM z/OS must properly protect MCS console userid(s).

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-223491ACF2-ES-000730SV-223491r958480_ruleCCI-000382medium
Description
In order to prevent unauthorized connection of devices, unauthorized transfer of information, or unauthorized tunneling (i.e., embedding of data types within data types), organizations must disable or restrict unused or unnecessary physical and logical ports/protocols on information systems. Operating systems are capable of providing a wide variety of functions and services. Some of the functions and services provided by default may not be necessary to support essential organizational operations. Additionally, it is sometimes convenient to provide multiple services from a single component (e.g., VPN and IPS); however, doing so increases risk over limiting the services provided by any one component. To support the requirements and principles of least functionality, the operating system must support the organizational requirements, providing only essential capabilities and limiting the use of ports, protocols, and/or services to only those required, authorized, and approved to conduct official business or to address authorized quality of life issues.
STIGDate
IBM z/OS ACF2 Security Technical Implementation Guide2025-06-24

Related Frameworks

1 mapping across 5 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (2) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

CFG-01Configuration Management Program
1.00
CFG-03Least Functionality
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (33) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-17(1)Monitoring and Control
1.00
AC-17(2)Protection of Confidentiality and Integrity Using Encryption
1.00
AC-17(9)Disconnect or Disable Access
1.00
AC-2(1)Automated System Account Management
1.00
AC-2(4)Automated Audit Actions
1.00
AC-3Access Enforcement
1.00
AC-4Information Flow Enforcement
1.00
AC-6(8)Privilege Levels for Code Execution
1.00
AC-6(9)Log Use of Privileged Functions
1.00
AU-12Audit Record Generation
1.00

+23 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.4.6
1.00
CCI1 mapping
CCI-000382
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (2) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

PR.PS-01
1.00
PR.PS-05
1.00

Who does this work

5 NICE work roles and 5 EC-Council certifications.

This is an inference across published mappings, not a single claim by anyone. This check maps to a control, which maps to a Cybersecurity Framework outcome, which NIST assigns to the work roles below. EC-Council separately maps its certifications to those same roles.

A certification prepares someone for a role. It is not evidence that a holder is qualified, and neither NIST nor EC-Council has stated that any certification here addresses this check.

Work-role assignments published by NIST (NICE Framework Components 2.2.0 and the CSF 2.0 OLIR crosswalk). Certification mappings published by EC-Council.

Details

Check Text (C-223491r958480_chk)

Refer to IEASYS00 to determine the correct CONSOLxx member. Examine the CONSOLxx member. Verify that the MCS console logonids are properly restricted. If the following guidance is true, this is not a finding. Each console defined in the currently active CONSOLxx parmlib member is associated with a valid ACF2 logonid. Each console logonid has no special privileges and/or attributes (e.g., ACCOUNT, SECURITY, etc.). Each console logonid has no accesses to interactive online facilities (e.g., TSO, CICS, etc., excluding VTAM SMCS consoles). Each console logonid will be restricted from accessing all data sets and resources except MVS.MCSOPER.consolename in the OPERCMDS resource class and consolename in the CONSOLE resource class. NOTE: If LOGON(AUTO) is specified in the currently active CONSOLxx parmlib member, additional access may be required. Permissions for the console logonids may be given with SERVICE(READ) to MVS.CONTROL, MVS.DISPLAY, MVS.MONITOR, and MVS.STOPMN OPERCMDS resources. NOTE: Execute the JCL in CNTL(ACFRPTRX) using the ACF2 console userids in the LID statements in the SYSIN input. This report lists all occurrences of these userids within the ACF2 database, including data set and resource access lists.

Fix Text (F-25152r504580_fix)

Define all consoles identified in the currently active CONSOLxx parmlib member in EXAM.RPT(PARMLIB) to be defined to the ESM. Review the MCS console resources defined to z/OS and the ESM and ensure they conform to those outlined below. Each console defined in the currently active CONSOLxx parmlib member is associated with a valid ACF2 logonid. Each console logonid has no special privileges and/or attributes (e.g., ACCOUNT, SECURITY, etc., excluding VTAM SMCS consoles). Each console logonid has no accesses to interactive online facilities (e.g., TSO, CICS, etc.). Each console logonid will be restricted from accessing all data sets and resources except MVS.MCSOPER.consolename in the OPERCMDS resource class and consolename in the CONSOLE resource class. NOTE: If LOGON(AUTO) is specified in the currently active CONSOLxx parmlib member, additional access may be required. Permissions for the console logonids may be given with SERVICE(READ) to MVS.CONTROL, MVS.DISPLAY, MVS.MONITOR, and MVS.STOPMN OPERCMDS resources. NOTE: If LOGON(AUTO) is specified in the currently active CONSOLxx parmlib member, additional access may be required. Permissions for the console logonids may be given with SERVICE(READ) to MVS.CONTROL, MVS.DISPLAY, MVS.MONITOR, and MVS.STOPMN OPERCMDS resources. Example: INSERT MVAC20 NAME(MVA CONSOLE C20) PASSWORD(xxxxxxxx) $KEY(MVS) TYPE(OPR) MCSOPER.- UID(MVAC20) SERVICE(READ) ALLOW CONTROL.- UID(MVAC20) SERVICE(READ) ALLOW DATA(FOR LOGON(AUTO)) MONITOR.- UID(MVAC20) SERVICE(READ) ALLOW DATA(FOR LOGON(AUTO)) STOPMN.- UID(MVAC20) SERVICE(READ) ALLOW DATA(FOR LOGON(AUTO)) DISPLAY.- UID(*) SERVICE(READ) ALLOW - UID(*) PREVENT SET R(OPR) COMPILE ' ACF2.MVA.OPR(MVS)' STORE F ACF2,REBUILD(OPR) $KEY(consname) TYPE(CON) UID(MVAC20) SERVICE(READ) ALLOW SET R(CON) COMPILE ' ACF2.MVA.CON(consname)' STORE F ACF2,REBUILD(CON)